Saint John's Eve and the first day of the Midsummer celebrations (although this is not the real summer solstice; see June 20) (Roman Catholic Church, Europe): First day of Golowan Festival (Cornwall)

Golowan is the Cornish language word for the Midsummer celebrations in Cornwall, UK; they were widespread prior to the late 19th century and most popular in the Penwith area and in particular in Penzance. The celebrations began on St John's Eve with bonfires, fireworks, dancing and music, followed by a fair around the town quay on Midsummer Day and were repeated on St Peter's Eve and St Peter's Day.

Cornwall is a ceremonial county in South West England. It is also one of the Celtic nations and the homeland of the Cornish people. The county is bordered by the Atlantic Ocean to the north and west, Devon to the east, and the English Channel to the south. The largest urban area is the Redruth and Camborne conurbation.